Insole



FIG. 1 is a rear left side perspective view of an insole according to the present invention with the flexible rear portion in the raised position;

FIG. 2 is a plan view of an insole according to the present invention with the flexible rear portion in the flat position; and,

FIG. 3 is a side view of an insole according to the present invention with the flexible rear portion in the flat position, each side being a substantial mirror image of the other. 

The ornamental design for an insole, as shown. 